You will find the extension indexing definition in your mindtouch.deki.startup.xml file. In the <indexer> section of the file you will find <filter-path extension= definition for the extension and the application used to index that file type. In my case I am running under Windows Server so I use the built in iFilter function and the provided Mindtouch iFilter interface application to index all of my files. So my <indexer> section looks like this:
Code:
<indexer>
<path.store>d:\dekiwiki\web\bin\cache\luceneindex\\$1</path.store>
<filter-path extension="*" arguments="$1">d:\dekiwiki\web\bin\filters\mindtouch.deki.filter.exe</filter-path>
</indexer>
Hope that helps.
Regards,
Mark C.